I'll tell you this upfront: you will very likely miss windows.
That set aside, I have used XP, 7, 8, Ubuntu 12.04, Ubuntu 13.04 and to be honest, it depends on the PC you have. My main computer is a beast. Octocore processor, 16GB of Ram, and a nice GPU that I can't remember. Everything ran loving wonderful. All OS's, though if you have a lesser quality computer (had an intel pentium 4, 1GB of RAM and a stuffty gpu), Windows 7 has run better than Ubuntu. 8 wouldn't install lol. On higher quality computers (Intel i7 with 8GB of RAM and a 680M, Windows 8 worked best out of 7, 8, and Ubuntu. Though my current laptop which is a midrange HP Pavilion dv7, a meh AMD processor 4GB ram you get it, vista sucked, my experience with Ubuntu was... Boring. At first I was extremely excited for Ubuntu. Though, idk, I got bored last night and put Windows 8 on, and it is running faster than it's glory days.
Tbh, Ubuntu was nice and all for coding, but really sucked ass at most other things. Video kept on loving up Elfen Lied wouldn't open up, audio had some wanky sound. The drivers were all updated too, idk. Windows 8 I haven't used much but I am having a much better time using on my lower end but still midrange laptop.